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实验教学是科学探究活动的重要组成部分,而教师课前的“下水实验”对于提高整个探究活动的有效性起到了积极作用。教师课前的“下水实验”有利于优选实验材料,弥补材料缺陷;有利于了解实验过程,预测实验问题;有利于优化实验时间,完善实验方案;有利于降低实验难度,突破实验难点。
Experimental teaching is an important part of scientific inquiry activities, and teachers’ “launching experiments” before class have played a positive role in improving the effectiveness of the whole inquiry activity. Pre-class “water experiment ” is conducive to optimizing the experimental materials to make up for the material defects; is conducive to understanding the experimental process to predict experimental problems; is conducive to optimizing the experimental time, improve the experimental program; help to reduce the experimental difficulty, breaking the experimental difficulties.